// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_TRUETYPE_FONT_HOST_H_
#define CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_TRUETYPE_FONT_HOST_H_

#include <stdint.h>

#include <memory>
#include <string>
#include <vector>

#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/sequenced_task_runner.h"
#include "content/browser/renderer_host/pepper/pepper_truetype_font.h"
#include "content/common/content_export.h"
#include "ppapi/host/host_message_context.h"
#include "ppapi/host/resource_host.h"

namespace content {

class BrowserPpapiHost;

class CONTENT_EXPORT PepperTrueTypeFontHost : public ppapi::host::ResourceHost {
public:
    PepperTrueTypeFontHost(BrowserPpapiHost* host,
        PP_Instance instance,
        PP_Resource resource,
        const ppapi::proxy::SerializedTrueTypeFontDesc& desc);

    ~PepperTrueTypeFontHost() override;

    int32_t OnResourceMessageReceived(
        const IPC::Message& msg,
        ppapi::host::HostMessageContext* context) override;

private:
    int32_t OnHostMsgGetTableTags(ppapi::host::HostMessageContext* context);
    int32_t OnHostMsgGetTable(ppapi::host::HostMessageContext* context,
        uint32_t table,
        int32_t offset,
        int32_t max_data_length);

    void OnInitializeComplete(ppapi::proxy::SerializedTrueTypeFontDesc* desc,
        int32_t result);
    void OnGetTableTagsComplete(std::vector<uint32_t>* tags,
        ppapi::host::ReplyMessageContext reply_context,
        int32_t result);
    void OnGetTableComplete(std::string* data,
        ppapi::host::ReplyMessageContext reply_context,
        int32_t result);

    // We use a SequencedTaskRunner to run potentially slow font operations and
    // ensure that Initialize completes before we make any calls to get font data.
    // Even though we allow multiple pending GetTableTags and GetTable calls, this
    // implies that they run serially.
    scoped_refptr<base::SequencedTaskRunner> task_runner_;

    scoped_refptr<PepperTrueTypeFont> font_;
    bool initialize_completed_;

    base::WeakPtrFactory<PepperTrueTypeFontHost> weak_factory_;

    DISALLOW_COPY_AND_ASSIGN(PepperTrueTypeFontHost);
};

} // namespace content

#endif // CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_TRUETYPE_FONT_HOST_H_
